Landry and her film director hubby, 35, married in April 2006. The spouses are already parents to daughter Estela, 6, and Marcelo, 21 months.

The former Miss USA tweeted a heads up to her Twitter followers on Thursday that she was in labor. "The time has come. Baby is on his way," she wrote with a smiley face. "On our way to the hospital." She later added, "Contractions are not too bad yet. I will try to do a live video later on [Hang With]. Follow me there to see how things are progressing."

Throughout her pregnancy, Landry tweeted updates to her fans about how she was staying healthy. "Only a few weeks from delivering, and instead of giving up work out sessions decided to switch to water workouts," she wrote on June 12. "I am in love. Feels amaz!"